Police are the perfect assassins & the perfect victims of assassinationBoth circumstances can be owed up to their chosen profession .Policemen are murdered all the time and nobody would ever question it happened for any other reason than the uniform they are wearing.
FWIW, in my teens in the 1960s I was stopped by police in Arizona a sufficiently embarrassing number of times that I had to provide an explanation to the State Bar when I became a lawyer in 1982. At no time did any officer approach me as though I might be a crazed killer.
Dale Myers specifically addresses this issue at the Tippit memorial site: https://www.jdtippit.com/faq.htmIn the FAQ "Why did Tippit stop Oswald?" he takes us through the witnesses who support that Oswald abruptly changed direction from west to east and that this caught Tippit's eye.
I don’t think that there is any way we will ever know for certain what caused Tippit to pull over. But Dale Myers does make a good case for that theory. I have also imagined this: provided Dale is right about the direction of LHO walking west, it appears to me that the taxi cab parked on the corner would have been prominent in LHO’s vision as he approached it. A theory that includes LHO either raising his hand to hail the taxi or LHO beginning to run towards the taxi, or both, in an effort to try to make sure that the taxi didn’t leave before he got there, could have gotten Tippit’s attention. Tippit might have even thought LHO was raising his hand as a gesture for Tippit to pull over. But, again, I don’t beleive that we will never know these things for certain.